Effect of Temperature and pH on enzyme action

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Results

Part A
Test Tube
 Observation for Iodine Test
 Inference
A
 Dark purple-black
 Presence of starch
B
 Blue Black
 Presence of starch
C
 Dark Brown
 Starch not present
D
 Dark Purple-black
 Presence of Starch
Part B
Test Tube
 Observation for Iodine Test
 Inference
W
 Dark Purple-black
 Presence of starch
X
 Remains brown in colour
 Starch not present
Y
 Brown in colour with tinges of purple colour
 A little starch present
Z
 Purple in colour
 Presence of starch